Cornice-brake



(No Model.)

G. O. KEENE.

CORNIUE BRAKE.

No. 862,749. Patented May 10,1887.-

FIE].

INVENTDR NlTED STATES GEORGE C. KEENE, OF CINCINNATI, OHIO.

CORNlCE-BRAKE.

SPECIFICATION forming part of Letters Patent No. 362,749, dated May 10,1887.

(No model.)

To all whom it may concern:

Be it known that I, GEORGE C. KEENE, a citizen of the United States,residing at Oineinnati, in the county of Hamilton and State of Ohio,have invented certain new and useful Improvementsin Cornice-Brakes, ofwhich the following is a specification.

My invention relates to certain improvements in machines for bending andshaping sheet metal, or, more particularly speaking, to improvements inthe cornice-brake patented by me July 1, 1884., No. 301,128. It has forone of its objects to provide upon the outer end of one of the axialjournals ot'the bendingapron or brake proper a segmental gear, keyedthereto and meshing with a drivingpiniou, which is mounted verticallyabove and provided with radial arms forming operatinghandles, wherebythe movementsofsaid apron may be facilitated for heavy work. Another ofits objects is to provide upon the outer end of the opposite axialjournal of the bendingbrake a quadrant or semicircular plate, adjustablyand detachably secured thereto, and having'a curved slot thereinconcentric to said journal, and adapted to receive the square shank of abolt, forming an adjustable dog or stop whose head abuts the fasteningscrewbolts of the stationary beam, whereby the bending-brake may beoperated continuously at a certain angle and its range of movementreadily limited and changed when required.

Other features of my invention will be fully set forth in the followingdescription of the accompanying drawings, in which- Figure 1 is aperspective view of a cornicebrake embodying my improvements; Fig. 2, afront elevation of the bending-apron detached from its journal-bearings,showing the segmental gear and slotted plate mounted, respectively, uponits opposite axial ends; Fig. 3, a rear elevation of one end of themachine, showing the segmental gear, pinion, and bandled hub foroperating the brake in connection with heavy iron; Fig. 4, an elevationof the outer face of the slotted quadrant-plate and the weighted leverfor counterbalancing the bendingapron; Fig. 5, a vertical crosssectionon the line a: a", Fig. 4; Fig. 6, a detail perspective view of theupper corner of the machine, adjacentto which the slotted quadrant-plateis mounted, showing the fastening screw-bolts,which serve as stops 0rabutments for the dog on said plate; and Fig. 7, a trans verse sectionof the stationary beam,the sheetclamping beam, and the bending-apron,taken .on line ?1 y of Fig. 1.

A A represent the supporting-legs of the machine; B, the connectingtic-beam, forming part of the sheet clamping apparatus; and O, thebending apron or brake proper, j ournaled at its opposite ends in boxes0 at the ends of the movable clamping-beam B.

c 0 represent the short axial shafts or journals of the apron one ateither end thereof-- the one, 0, having a segmental gear, D, keyedthereto, and the other, 0', having a quadrant or semicircular plate, E,adjustably and detachably secu red thereto by means of ascrew,e.

F represents a pinion mounted upon a stud or short shaft,f, whichprojects laterally from the upright angular lug G, secured upon theframe leg A, as shown in Fig. 1, or made a part thereof, as shown inFig. 3, either of the latter forms of lug being optional.

Pinion F meshes with the segmental gear D, mounted below it, and isrigidly connected with a hub, H, which is mounted on said st-udfoutsidethe pinion, and provided with handles or arms I, whereby thebending-apron is operated.

J and J representa weight and rod, respectively, on the outer endofjourual c, the lower end of which rod is adj ustably and dctachablysecured in the hub j of the quadrant E for their customary use-viz.,that of counterbalancing the weight of the bending-apron. e is a curvedslot in quadrant E, concentric to its supportingjournal.

E is a bolt with its shank lying within slot 6', its head being on theinside and the fastening-nut on the outside of said quadrant. Ihe shankof bolt E may be made either round or angular; but I prefer the latterform, as it is best adapted to facilitate the setting of the nut inplace on thebolt after any adjustment thereof. lhe head 6 of bolt Eserves as a detent or dog, which abuts either one of the projectingheads of screws K, or a separate stop on the main frame, (according tothe radius of the slot e,-) in the operation of the machine, to hold orcatch the bendingapron at any deft nite angle in the operation thereof,and thereby obviate the necessity of making a full stroke of said apronfrom a vertical to a horizontal position in making each bend in acontinuous number of bends in theiron on one hand, and preventing theapron moving too far or beyond the required angleon the other hand.

The position of the detent or dog E in the slot 0 determines the actionof the bendingbrake, whether it be for limiting said brake to bend theiron at a certain angle or catching the brake on its downward orretreating 1novement.

The quadrant is adjustably secured on the shaft c by screw e, so that itcan be readily attached or detached, as occasion may re.

quire.

In the operation of my machine the sheet is placed between thestationary or tie beam B and the movable beam B, and tightly clamped inthe desired position by means of the foot treadle mechanism composed ofthe vertical bars I) b, shaft 1), and treadle-levers b b", and releasedby the handled lifting-rods If, as fully shown in Fig. 1, and describedand claimed in my said former Letters Patent.

I claim 1. In a cornice-brake, the combination,with the journal 0" ofthe bending-apron, of a quadrant or plate, E, suitably mounted thereon,and provided with a curved slot, en, receiving an adjustable stopor'bolt, E, which engages the head of either of the screws K or othersuitable obstruction on the main frame, Whereby the sheet of metal to bebent may be operated upon by saidbending-apron continuously at any givenangle, or the range of movement of said apron limitedand readilyaltered, substantially as and for the purpose herein set forth.

2. In a cornice-brake, the combination,with the bending apron G, of agear -Wheel, D, mounted upon its journal 0, pinion F, and handled hub HI at one end thereof, and slotted quadrant E e e, mounted upon itsjournal 0", and the adjustable detent or stop E at its opposite end,constructed, arranged, and adapted to operate in connection with thebolt-heads K or other suitable abutment 011 the main frame of themachine, substantially as herein set forth.

In testimony of which invention I hereunto set my hand.

GEORGE O. KEENE. \Vitnesses:

J OHN E. J oNEs, JOHN ADAM.

